Led Zeppelins performance took place towards the end of its 1977 North American tour. Unknown at the time, these were to be Led Zeppelins final U.S. shows due to the sudden death of Robert Plant's young son Karac in the UK. The July 23 show was followed by the infamous beating backstage and in a band trailer of one of Bill Grahams crew by Led Zeppelins road manager and security manager. The July 24 show almost did not occur because of the brawl
The following segment by Steven Rosen-Rock journalist
Jack Calmes was there and he describes the violence of Zeppelin